Huangdao long-snouted beetle

The snout is flat conical, with a longitudinal groove on the central line of the back and ventral surfaces. The surface of the collar is smooth, with a circumferential groove in the middle and rear, and a circumferential white raised edge on the rear edge. The gonads are well developed. The snout is light orange, the collar is dark orange, the gill reproductive area is light yellowish brown in females, and light yellowish brown or orange in males, the liver area is dark green, and the back of the tail area is white. The anal rim often has a darker brown pigment.

Distributed in Jiaozhou Bay, Shandong Province. It inhabits intertidal zones and lurks on sandy or muddy bottoms.

Saccoglossus hwangtauensis (scientific name: Saccoglossus hwangtauensis) is an enterobranchial species distributed in the intertidal and subtidal zones of Jiaozhou Bay, Qingdao City, Shandong Province, China. It belongs to the genus Saccoglossus of the family Ancylostidae.

The Huangdao longnose bug has a soft body and is worm-like. The total length is 290 mm, the average snout length is 15.6 mm, and the average width is 5.6 mm. The collar is wide and short, with an average length of 2.85 mm and a width of 5 mm. The gill reproductive part located on the back of the front part of the trunk is well developed, and the front end is connected to the rear edge of the collar, and is about 200 mm long. There are two light-colored ridges between the reproductive wings, which gradually approach each other backward until they are close to each other. The snout, collar and the first half of the gill genital wing are light orange, the rear half of the gill genital wing and the liver caecum are greenish brown. The brown pigment gradually decreases and the yellow pigment gradually increases towards the back of the tail. turns yellow.

Reasons for endangerment: habitat loss and environmental pollution.